Smoke-washing means



March 31, 1931. J. BRDAR' SMOKE WASHING MEANS 2 Sheets-Sheet 2 Filed July 19, 1929 V ///V/////7/////7 7/////////////A////////////////////// f0 72 12 Braan INVENTOR ATTORNEY Patented Mar. 31, 1931 PATENT pm JoI-m BRDAB, or-onlroaeo, ILLINOIS smoxn-wasnme mnans aji ucaum filed m 19, 1929. Serial No.. 379,553.

This invention relates to smoke washing means for smoke-stacks, the general obJect of the invention being to provide means for spraying the smoke with water as it passes through the stack, whereby soot or carbon and noxious and dangerous gases are removed from the smoke before it leaves. the

stack.

Another object of the invention is to pro; vide means for catching the sprayed water and returning it to a tank so that it may be used over and over again.

Another object of the invention is to pro parts, to be hereinafter fullydescribed, illus trated in the accompanying drawings and specifically pointed out in the appended claim.

In describing the invention in detail, refer-' ence will be had to the accompanying drawings wherein like characters denote like or corresponding parts throughout the several views, and in which Figure 1 is a diagrammatic View, with parts in section, showing the invention in use.

Figure 2 is a section on line 2--2 of Figure 1.

Figure 3.is a view, partly in section, show- .ing the means for controlling the flow of water to the spraying tubes during the operation of the device, and for directing the water to the tubes for thepurpose of cleaning the same.

Figure 4 is a view showing a modified form of the invention, this form being used 'on square stacks.

Figure 5 is a section on line 55 of Figure 4. P

Figure 6 is a section on line 66 of F i-gure 5.

In these views, the numeral 1 indicates a portion of a stack and 2 indicates a casing snugly fitting in a part of the stack and suitablysecured thereto. This casing is formed with a frusto-conical part 3 in its lower end which is spaced from the walls of the casing by an annular part 4, so that the conical member and this annular part, with the lower part of the casing, forms a trough. A vertically arranged pipe 5 passes through the center of the casing and a portion of this pipe, above the part 3,'is formed with the perforations 6, so that water escaping from .these perforations will be sprayed downwardly and outwardly,'as shown, so that the smoke passlng through the casing will be washed and soot and gases will 'be removed therefrom. Pipes 7 connect the lower end of the pipe 5 with a pump8, some of these pipes 7 ng arranged exteriorly of the stack.- A pipe 9 connects the pump with a tank 10, a screen 11 being placed over the outlet end of vthe pipe within the tank so as to prevent foreign matter from entering the pipe 9. Pipes 12 connect the upper end of the pipe 5 with the tank, so that the water not passing through the perforations m the pipe 5 will return to the tank. A pipe 13 connects the trough, formed by the conical member at the bottom of the casing 2, with the tank so that the sprayed water, with the soot and other foreign matter therein, is returned to the tank. A screen 14 is arranged in the tank and covers the outlet end of the pipe 13 for catching the major portion of this foreign matter. 4

A tray 15 is placed on the pipe 5 under the perforated part and a pipe 16 leads from this tray to a point above the tray so that the water running down the sides of the pipe 5 will be delivered into the trough, from 9 which it will return to the tank from the pipe 13.

A by-pass- 17 is arranged in the pipes 7 and 12, with valves'18 and 19 associated therewith, so that when the valve 19 is in one position, water will flow from the pump through the pipes 7 into the pipe 5 and the water will flow from said pipe 5 through the pipes 12, a portion of the by-pass into the tank, when the valve 18- is in the position it occupies in Figure 3. If the perforations in pipe 5 should become clogged, the valves 18,-

'slopmg wall of the funnel and be directed and 19 are reversed so that water will flow through the casing of valve 19 into the pipe 12 and thus enter the pipe 5 from the upper end thereof and some of this water will pass through the bypass through the valve 18 into the pipe 7 and enter the pipe 5 from the lower end thereof. This operation will serve to force the matter clogging the perforations from said perforations.

The change in the direction of flow, es pecially by alternately operating the valves, will loosen particles of foreign material, not otherwise immediately dislodged.

Fresh water is supplied to the tank whenever.desired through the pipe 20 which is connected with a suitable source of supply and which is provided with a valve 21, and a number of pipes 22 extend through the top of the tank and have their lower ends curved to direct the water against the bottom of the tank so as to wash out sediment and the like collecting in the bottom of the tank through the discharge23 which is provided with a valve 24 and a cover 25. The upper ends of the pipes 22 are connected to a pipe 26 which is connected with a supply pipe 20 through the branch 27 and this pipe can be connected to a supply of hot water through a pipe 28. A valve 29 is arranged in each pipe 22.

The tank is provided with clean-out means 30 and with an overflow pipe 31.

As it is preferable to use hot water in washing the smoke, I connect the steam exhaust pipe 32 of the system with the tank by the pipes 33 in which is arranged a valve 34 so that by opening this valve 34 and closing the valve 35 in the pipe 32, steam will enter the tank and heat the water therein. A thermometer 36 is connected with the tank for indicating the temperature of the water, and a level gauge 37 is also associated with the tank.

A small pipe containing a valve 38 is connected .with the discharge 23 so that the foreign matter washed from the smoke and contained in the tank, can be tested whenever desired.

The tank and the pump are supported on the bases 39.

When the invention is to be used with a square stack a square casing 2' is placed in the stack and a plurality of perforated pipes 6', with their headers 6", are placed in one side of the casing, so that the water will pass from the perforations across the casing and strike the opposite side thereof, and this opposite side, at its lower end, slopes downwardlly and inwardly, as shown at 2", so that t e water striking the casing, will flow down the sloping side and drop into a funnel 40, from which the water flows through the pipe 13' into the tank. This funnel has its inner wall sloping downwardly toward the moans i wall of the stack with which the funnel is connected, so that the smoke will strike this upwardly toward the sloping wall of the 'casing 2 and then the smoke will pass between the funnel and the sloping wall 2" into the casing. Thus the smoke will be washed by the water dropping from the casing into the funnel, and it will be further washed by the water sprayed from the pipe 6'. A tray 15' is arranged under the spray pipes and has an outlet pipe 16' for directing the water into the funnel 40. In other respects, this form of the invention is similar to that before described.

From the .foregoing it will be seen that the smoke is thoroughly washed by the water, which, as before stated, is heated so that soot and gases are removed therefrom before the smoke escapes from the stack.

I provide a steam pipe 41 for injecting steam into the stack to increase the draft.

It is thought from the foregoing description that the advantages and novel features of the invention will be readily apparent.

It is to beunderstood that changes may be made in the construction and in the combination and arrangement of the several parts, provided that such changes fall -within the scope of the appended claim.

IVhat I claim 'is:-

A device for cleaning smoke in a stack, comprising a casing arranged in the stack and through which the smoke passes, a pipe in the casing having openings for spraying water through the smoke, a trough at the bottom of the casing for collecting the sprayed water after it has passed through the smoke, a pump for forcing water to the spray pipe, a tank, a pipe leading the water from the trough to the tank, a pipe for connecting the tank with the pump and means whereby the pump can be connected with both ends of the spray pipe whereby the spray pipe can be cleaned when the openings therein become obstructed, these means including direct and indirect ducts connected with the respective ends of the spray pipe, and a valve in each duct, controlling the flow through each duct.

In testimony whereof I afiix my signature.

, JOHN BRDAR. 

